01db473e1a
PowerPC provides an equivalent to the common kernel-mode FPU API, but in a different header and using different function names. The PowerPC API also requires a non-preemptible context. Add a wrapper header, and export the CFLAGS adjustments. Link: https://lkml.kernel.org/r/20240329072441.591471-9-samuel.holland@sifive.com Signed-off-by: Samuel Holland <samuel.holland@sifive.com> Acked-by: Michael Ellerman <mpe@ellerman.id.au> (powerpc) Reviewed-by: Christoph Hellwig <hch@lst.de> Acked-by: Christian König <christian.koenig@amd.com> Cc: Alex Deucher <alexander.deucher@amd.com> Cc: Borislav Petkov (AMD) <bp@alien8.de> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Dave Hansen <dave.hansen@linux.intel.com> Cc: Huacai Chen <chenhuacai@kernel.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Masahiro Yamada <masahiroy@kernel.org> Cc: Nathan Chancellor <nathan@kernel.org> Cc: Nicolas Schier <nicolas@fjasle.eu> Cc: Palmer Dabbelt <palmer@rivosinc.com> Cc: Russell King <linux@armlinux.org.uk> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: WANG Xuerui <git@xen0n.name> Cc: Will Deacon <will@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
29 lines
509 B
C
29 lines
509 B
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2023 SiFive
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*/
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#ifndef _ASM_POWERPC_FPU_H
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#define _ASM_POWERPC_FPU_H
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#include <linux/preempt.h>
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#include <asm/cpu_has_feature.h>
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#include <asm/switch_to.h>
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#define kernel_fpu_available() (!cpu_has_feature(CPU_FTR_FPU_UNAVAILABLE))
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static inline void kernel_fpu_begin(void)
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{
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preempt_disable();
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enable_kernel_fp();
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}
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static inline void kernel_fpu_end(void)
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{
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disable_kernel_fp();
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preempt_enable();
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}
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#endif /* ! _ASM_POWERPC_FPU_H */
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